Soft felts for high-temperature furnaces

Flexible, oxidation resistant, efficient.

Soft felts are flexible insulation materials for high temperature applications in inert or vacuum atmosphere and consist purely of carbon fibers.

Stability of the felt is already defined in the first production step, the needling process and prevails throughout all following high temperature steps. Furthermore, soft felts can be used in energy storages like redox-flow batteries due to their controlled inner structure and electrical conductivity.

We market our soft felt for insulation application under the SIGRATHERM brand. Specially developed soft felt for energy storage applications, the so-called battery felts, are offered under the SIGRACELL^® brand.

Very low thermal conductivity at highest temperatures
Low heat capacity
Suitable for very high temperatures
Pure carbon fiber

The base material for the production of carbon and graphite soft felt is felts made of needled cellulose fibers. These are processed into carbon soft felts by thermal treatment at 800-1,000°C. If these felts are treated at even higher temperatures >2,000°C, the carbon fibres increasingly take on a graphite-like structure, the so-called "graphite soft felts", without a real graphite structure being given.

All soft felts can easily be cut with knives and scissors and thus easily adapted to the desired shapes.

Manufacturing of SIGRATHERM carbon and graphite soft felts — The base material for the production of SGL Carbon's SIGRATHERM^® soft felt is felts made of needled cellulose fibers. These are processed into carbon soft felts by thermal treatment. If these felts are treated at even higher temperatures, the carbon fibres increasingly take on a graphite-like structure, the so-called "graphite soft felts".

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June 12-16, 2023, Messe Düsseldorf, Germany
Hall 09, Booth F40

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Brochures, technical data and information sheets on our products for high-temperature and thermal management applications can be found in our SIGRATHERM Download Center.

Downloads SIGRATHERM

Brochures

The Performancers: Specialty graphites for high-temperature furnaces

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The Performancers: Specialty graphites for high-temperature furnaces, Chinese

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The Performancers: Specialty graphites for high-temperature furnaces, Japanese

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